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Nonparametric analysis of correlations in the binary black hole population with LIGO-Virgo-KAGRA data

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arxiv 2406.16844 v3 pith:QOKPM6HU submitted 2024-06-24 astro-ph.HE gr-qc

Jack Heinzel , Matthew Mould , Salvatore Vitale This is my paper · ORCID
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Formation channels of merging compact binaries imprint themselves on the distributions and correlations of their source parameters, but current understanding of this population is hindered by simplified parametric models. We overcome such limitations using PixelPop [Heinzel et al. (2025)]-our Bayesian nonparametric multidimensional population model. We analyze data from the first three LIGO-Virgo-KAGRA observing runs and make high resolution, minimally modeled measurements of the pairwise distributions of binary black hole masses, redshifts, and spins. We find no evidence that the mass spectrum evolves over redshift and show that such measurements are fundamentally limited by the detector horizon. We find support for correlations of the spin distribution with binary mass ratio and redshift, but at reduced significance compared to overly constraining parametric models. Confident data-driven conclusions about population-level correlations with flexible models like PixelPop will require more informative gravitational-wave catalogs.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A Four-dimensional Model-agnostic Probe into the Astrophysical Origins of Binary Black Hole Subpopulations

    astro-ph.HE 2026-07 conditional novelty 7.0 of 10

    A GPU-accelerated binned Gaussian process yields the first model-agnostic 4D BBH population in (m1, q, χeff, χp), revealing four mass-based subpopulations and new spin-mass-ratio correlations.

  2. Nowhere left to hide: revealing realistic gravitational-wave populations in high dimensions and high resolution with PixelPop

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    Modeling all significant correlations with the nonparametric model PixelPop recovers the true black-hole merger rate in a simulated 400-event gravitational-wave catalog, while simpler models introduce bias.

  3. The Long Road to Alignment: Measuring Black Hole Spin Orientation with Expanding Gravitational-Wave Datasets

    astro-ph.HE 2025-05 conditional novelty 6.0 of 10

    Simulated gravitational-wave catalogs show spin-tilt peaks at alignment are hard to confirm even with 1500 events, while integrated tilt fractions are robust.

  4. Population of Binary Black Holes Inferred from One Hundred and Fifty Gravitational Wave Signals

    astro-ph.HE 2025-10 conditional novelty 5.0 of 10

    A population analysis of 153 LIGO-Virgo-KAGRA black-hole mergers reports chirp-mass peaks near 8, 14, and 27 solar masses, spaced by ~1.9, which the author interprets as possible hierarchical mergers.

  5. Inferring the pair-instability mass gap from gravitational wave data

    astro-ph.HE 2025-06 conditional novelty 5.0 of 10

    Non-parametric analysis of GWTC-3 finds a transition at roughly 46 solar masses above which the effective spin distribution broadens and becomes consistent with symmetry around zero, consistent with second-generation ...

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